//图片滚动速度
    var speed = 600;

    //获取需要处理的DOM元素
        var scroll_begin = document.getElementById("scroll_begin");
var scroll_end = document.getElementById("scroll_end");
var scroll_box = document.getElementById("scroll_box");

    console.log(scroll_begin);
console.log(scroll_end);
console.log(scroll_box);

    //复制图片元素
        scroll_end.innerHTML = scroll_begin.innerHTML;

    //设置滚动区域
        scroll_box.scrollLeft = 0;

    // console.log(scroll_begin.offsetWidth);
        // console.log(scroll_end.offsetWidth);

                function marquee(){
                        // console.log(scroll_box.scrollLeft);
                            if(scroll_box.scrollLeft >= scroll_end.offsetWidth){
                                scroll_box.scrollLeft -= scroll_begin.offsetWidth;
                           }else{
                                scroll_box.scrollLeft++;
                           }
                    }

//定时滚动
    var flag = setInterval(marquee, speed);

    //鼠标事件
        scroll_box.addEventListener(
                "mouseover",
                function () {
                      clearInterval(flag);
                   }
            );

    +scroll_box.addEventListener(
        "mouseout",
           function () {
                  flag = setInterval(marquee, speed);
               }
        );